11-71. A particular proton in space is subjected to two fields: a
gravitational field (1.30X105 N/kg toward planet X),
and
an electric field (2.47X10-4 N/C away from planet X).
(a) If the proton is released from rest, in which direction will
it move?
(b) After moving 1.50 m, what will be its speed? Use energy
methods
and assume uniform fields.
ACCUMULATED SOLUTION
FE = qE
Fg = mg
Correct.
Before continuing, calculate FE and
Fg . The mass of the proton is 1.673X10-27
kg
and the charge on a proton is 1.602X10-19 C.
Continue.